%0 Journal Article %A S.Y. Shaw %A Y.C. Li %T Representation formulas for C-semigroups. %J Semigroup forum %D 1993 %P 123-125 %V 46 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1993__46_1_135220/ %F SF_1993__46_1_135220